Bag conveyer



Dec. 10, 1929. c. G.'KRoNMn- LER ,I

BAG CONVEYER Filed May 7, 1927 I1/manto@ CarG-Kronmi/er.

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\l il Patented' Dee.' 1o, 1929 PATENT OFI-ion UNITED s'mfrlazs` CARL G. KRONMILLER, F CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ST. REGIS PAPER COMPANY,`OF NEW YORK, N. Y., A CORIORACLIONv OF NEW Yom:

BAG CONVEYER Application cled May 7, 1927. Serial No. 189,547.

This invention relates to a bag conveyer, and more particularly to a conveyer adapted to receivel bag-forming portions of paper tubes from a tube forming and severing machine, and to convey the bags away from such a machine While retaining the pastedl seams in proper position for drying.

The particular objects of the invention are to provide such a conveyer for the bags which Will receive the bagsin succession as delivered from severing apparatus, and will automatically form the bags into a regular pile, either shingled or in successive groups; and which will provide means for holding compressed the pasted seam, while the bags are being conveyed,;until the seam is sufliciently set to prevent its opening up. D

In the accompanying drawings forming a part of this specification, Figurel is a side elevation of apparatus embodying one form of my invention ;v Fig. 2 is a transverse section on the line 2-2 of Fig. 1; Fig. 3 is an enlargement of a portion of the view shown in Fig. 2. In the form of apparatus shown in the drawings, there is a frame 10 carrying at its V opposite ends shafts 11. Rollers 12 are carried on the shafts 11 and receive'around them an endless conveyer'belt 13. The lower run of belt 13 is supported upon rollers 14 suitably mounted in the frame. For support- ,f ing the upper run of the belt there are arched shafts 15 carrying rollers 16 held in place by collars 17. As brought out clearly in Fig. 2, the roller 16 beneath the central longitudinal line of the upper run of the belt are higher than those rollers 16 towards the sides of the belt, so that the lcentral portion of the belt is arched upwards.A

The belt is adapted to receive a succession of bags 18 as they are delivered from a tube forming and cutting apparatus, the delivery end of which is illustrated diagrammatically at 19. Conveyer belt 13 is run more slowly than the conveyer of the forming and cutting apparatus, so that the bags will be super- ,posed upon each other in shlngled relation, as

clearly indicated in Fig. 1.

A pressure shoe 20 is provided for resting upon the bags. The receiving end of the the underside or upon the upper side of the bag as it is delivered from the bag machine.

If it is'upon the under side, the weight of the bags prevents the opening up of the seam sufficiently under ordinary-conditions. In the construction shown the bags are delivered with their pasted seams upon the upper side.

The apparatus is particularly adapted for -receiving tube lengths having longitudinal gusset folds 24 at the sides. These gusset folds n'iakethe sides of the bag length thicker than the middle portions thereof, as clearly appears from Figs. 2 and 3. The rods or shafts 15 Aare arched upward suiciently so `that the piling up of the gusset folds, one

upon the other, does not make the pile at the sides rise materially higher than the central portion of the bags. It has been found that where such bags are discharged upon a iat belt, the thickened sides quickly cause the stack to assume a troughed form, and when this happens it is very diflicult toprevent the bags from becoming displaced. With a conveyer constructed as'shown and described, there is no difficulty in keeping the bags in proper relation to each other upon the conveyer.

While the apparatus might be used -for single-walled bags, it is particularly adapted for multi-ply bags. In Fig. 3 the upper one of a series of such bags is disclosed, the plies being exaggerated in thickness for purposes of illustration. As willbe readily seen, the shoe 20 is so located that it rests upon the seam 25.y of the outer ply of paper. The outer plies rest upon and prevent the opening up of the seams 26 of the inner plies, so that the shoe20 does not need to be wide enough to cover all ofthe seams. It is sulicient if it holds securely in position the seam of the outer ply.

No means for actuating the conveyer is 7 illustrated. lt will be readily understood that it may be moved forward at a continuous, comparatively slow rate, so that a layer of bags of the desired thickness will be deposited thereon, and so that the seams of the bags will become sufficiently driedwhile they are beneath shoe 20. The conveyer might be moved forward intermittently as successive bags are placed thereon in order to receive them in proper stepped relation, or it might be moved intermittently so as to receive a desired number of bags in one pile, and then another pile of bags following it.

The conveyer belt, of course, will be horizontal where it leaves roller 11 at the receiving end of the belt and the central portion of the belt gradually arches upward from this point. 1n the construction shown, it is arched upward :tast enough so as to counterbalance the stacking up oi the thickened edges of the pile of bags'A so that each bag length is received upon the conveyer with both its upper and its lower ends substantially straight across. As the pile is moved for ward from this position, the lower end of the bag is gradually raised and arched, but the upper end of the bag remains substantially straight across.

If theapparatus were operated intermittently so as to receive a number of bags in one position piled on top of another and then moved along a bag length to receive another similar pile, he bags should be received by the conveyer at a point where the belt is arched upwards along the entire length of the bag, so that the bag will lie properly upon the belt.

As many roller-carrying shafts or rods 15 may be provided as desired, and a stationary support 27 may be held in place by arched members 28. lli desired, suiiicient rollers could be used so that support 27 would not be necessary, or a continuous support 27 could be used without the rollers 16. Other departures may be made from the details of the illustrative apparatus shown and described, within the terms of the appended claims.

What l claim is:

l. An ott-bearing belt for lengths of flexible tubing, comprising a conveyer belt and a support beneath the receiving position of the belt, said support being arched upward along the central longitudinal line of the received length of tubing.

2. An off-bearing belt for paper bag lengths, comprising a conveyer belt and a support for the upper run of the belt, said support being highest along thelongitudinal central line of the belt.

3. An ott-bearing belt for lengths of gusseted tubing and Iar'support for the upper run of the belt, .the central portion of the support being enough higher than the side portions to make up for the extra thickness of the lengths at their sides.

4. An olf-bearing belt for gusseted tubing and a support for the upper run of the belt, said support rasing the central longitudinal line of the belt more than its edges, the amount of said raising gradually increasing as the belt moves away from the receiving end.

5. An off-bearing belt for gusseted tubingl and means for holding the shoe upon the 4 pasted seam of the outer ply of each successive length.

8. The method of handling paper` bag lengths which consists in receiving the lengths upon an endless belt in superposed shingled relation, moving the belt carrying the lengths, pressing upon the exposed ends 'of the longitudinal pasted seams of the lengths while on the belt until they are sutliciently dry to prevent opening while maintaining other portions of the lengt-h free from any pressure except that exerted by the weight of the bags.

9. rllhe method of handling bag lengths of gusseted paper tubing, which consists in receiving the lengths upon an off-bearing belt in superposed shingled relation and pressing upon the exposed portions of the longitudinal pasted seam while on the conveyer until the seam is suihciently dried to prevent opening while maintaining the gusset-folded portions of said lengths free from pressure other than that of the weight of the bags.

lO. The method of handling bag lengths of gusseted paper tubing with longitudinal pasted seams, which consists in receiving the lengths upon an oli-bearing belt in superposed shingled relation with the seam side upward, raising the longitudinal central line of the belt at such a rate as to maintain the middle of the lengths as high as the gusseted edges thereof, thereby maintaining the upper side stretched smoothly away from the seam, and pressing the exposed portions of the seams until sufficiently dried to prevent lopening.

l1. The method of handling bag lengths of gusseted paper tubing with longitudinal pasted seams, which consists in receiving the lengths upon an ofibearing belt in superposed shlngled relation with the seam side upward, ralsing the longitudinal central line 'of the belt at such a rate as to maintain the middle of the lengths as high as the gusseted edges thereof, thereby maintaining the upper side stretched smoothly away from the seam, l

and maintaining this relation of the lengths ,l until the seam is suiciently dried to prevent opening.

12. The method of handling bag lengths of gusseted paper tubing, which consists in receiving the lengths upon an off-bearing belt in superposed shingled relation with the gusseted sides towards the sides of the belt, and raising the longitudinal central line of the belt suiciently to maintain the middle of the lengths as high as the gusseted edges.

13. The method of handling bag lengths of gusseted paper tubing, which consists in depositing len ths longitudinally in succession upon a lexi le support, moving the support at such a rate with respect to the delivery of the lengths that the lengths are deposited upon the support in superposedl shingled relation and gradually elevating the central longitudinal line of the flexible support at such a rate as to oset the added thickness of the ussets at the sides of the lengths and there y maintainl the upper .ends bf the lengths substantially horlzontal, whereby successive lengths are deposited upon the offbearing support in a substantially flat plane and the upper end remains substantially horizontal while the lower' end of each length is curved with the gusseted sides bent downward suiiciently to compensate for the added thickness of the gusseted sides superposed thereover at any given point during the progress of such lower end of the len h.

In testimony whereof I have hereunto signed my name to this specification. 40 CARL G. KRONMILLER. 

